Process for the manufacture of aluminium nitrid.



' tain when using or current of nitrogen con- OTTOKAR SERPEK, OF PARKS, FRANCE,

ueronon. T0 soortu'rn eniun'nnnn ions NITIRURES, OF PARIS, FilmihNCE.

nor/now.

No Brewing.

To all whom 2'? may concern:

Be it known that l, Orrouu'n Snnrnu, :1. subject of the Emperor of rlustrinllungory, and u resident of lluo lloquepine, Paris, France, have invented u. new and useful Process for the ili unu'fucture oi .iilulninium Nitricl, of which the following is n specificntion.

The present invention relates to a proces; for the manufacture of aluminium nitrid. consisting in heating u mixture of carbon and ulun'iinu. or ulunlinous substunces (bauxite, kaolin, etc.) in it current oi? nitrogen eon-- min free hydrogen.

it has been nsccrluined indeed that when u. mixture of carbon and uhuninonn sub stances (bauxite, lanolin, etc.) is beut l in a current of nitrogen containing hyt'iropjen or substances capable of settingthe hydro; gen free irorn the nitrogen under the conditions of the operation, such are curbids or suificls of hydrogen, the alumina. fixes the nitrogen in the form of nitriil; it hos, moreover, been found that the gases lean ing the apparatus in which the reaction takes place, contain cyanogen which can be recovered by absorbing it in any known manner at the exit. This method presents the great advantage of allowing aluminium nitrid to he obtained at tempo 'utures very considerably lower than those which it is necessary to atmining no hydrogen; further, if working at thehigh temperatures hitherto used, it u1- lows of quicker action.

Emmi 2,3926 I.

(a) A mixture 0t 10 parts of alumina. and i Specification of Letters Patent.

Application filed May 7, 1912.

Patented Nov. l llfil.

Serial no. 695,791

4: ports oi. carbon. was heated for one hour at 14l00-i l50 G. in a. current of nitrogen. lhe product contained 0.7% of nitrogen.

(b) An identical mixture was trezited in. the Same conditions of tcinpersture and time in a current of nitrogen containing hydrogen. volumes of hydrogen to 7 volumes olh m nitrogen). The product obtained. contained 8.6% of nitrogen.

Zi'azomplo H.

(as) ll. mixture of 10 pin-h; oil' bauxite and i ports of carbon was heated tor one hour at i500--l520 C. in it current of nitro gen. The product obtained contained 13% of nitrogen.

(by An identical mixture was treuteoi in two subscribing witnesses.

OTTOKAR SERPEK.

Witnesses H. C. Coxn,

Li'iou Pninmrr.

(iii 

